Pulverizing material



R. E. H. POMEROY. PULVERIZING MATERIAL. APPLICATION man JAN.16, 1922.

1,481,252,, Patented Oct. %0, 1922.

Q LL [1. E U GEE? WMWWWHTHHIHHW FIG. 1 13:21::-

B I r R. E. H. POMEROY.

PULVERIZING MATERIAL.

APPLICATION FILED JAN. 16. 1922.

Patented Oct. 10, 1922 10 SHEE'IS -SHEET 2.

Fill 4- FIG?) INVENTGR am- M... M

' ATTORNE R. E. H. POMEROY.

PULVERIZING MATERIAL.

APPLICATION FILED JAN. 16. 1922.

1,431,252., ented Oct. W, 1922.

I0 SHEETS-SHEET 3.

FIG. 5

FIG. 6

INVENTUR R. E. H. POMEROY.

PULVERIZING MATERIAL. APPLICATION FILED IAII. I6, 1922.

1,431,252, Patented Oct- 10,1922.

l0 SHEETS SHEET 4.

(D 9' LI.

$- t i j :1: IIZL I .1 a I E; J u

INVEN UR WMW R. E. H. POIVIEROY. PULVERI ZING MATERIAL.

APPLICATION FILED JANJIS, I922. 1 ,4315252, Patented Oct. 10, 1922.

I0 SHEETSSHEET 5.

INVENTOR I 5? P I W-jw) ATTORNEY R. E. H. POME ROY. I PULVERIZING MATERIAL APPLICATION FILED JAN. 16, 1922- 1,431,252, Patented Oct; 10,1922.

1U SHEETS-SHEET 6.

FlGfll INVENTUR' qmm ATTORNEY R. E. H. POMEROY. PULVERIZING MATERIAL. APPLICATION FILED AN. I6, [922.

Patented Oct. 10, 1922?.

10 SHEETS--SHEET I.

INVENTOR ATTORNEY R. E. H. POMEROY.

PULVERIZING MATERIAL.

APPLICATION FILED ]AN.L6,1922| 1,431,252, Patnted Oct. 10, 1922.

10 SHEETS--SHEET 8.

U f L [I U U W ATTORNEY R. E. H. POMEROY.

PULVERIZING MATERIAL.

APPLICATION HLED JAN. 16, 1922.

1,431,252, Patented 0ct.10,1922.

l0 SHEETS-SHEET 9- INVENTUR ATTEIRNEY R. E. H. POMEROY.

PULVERIZING MATERIAL.

APPLICATION FILED JAN. I6. 1922.

FIG. 18

INVENTUR ATTDRNEY Patented Got. 19, E922. f'

A ENT @FFH@EQ RALPH nqn. r'oMEnoY, or CANTON, OHIO.

' wnvnmzme MATERIAL. I Application filed January 1c, 1522. Serial no. 529,432.

To whom it may concern: I chamber, removing the more or less com- Belt known that I, RALPH E. H. POMEROY, pletely reduced material to another chamber v55 residing at'Canton, in the county of Stark for further reduction, the transfer of themaand State of Ohio, a citizen of the United terial from one chamber toanother being 5 States, have invented or discovered certain effected by currents of air which in each new and useful Improvementsin Pulverizchamber pass through the charge, i. e., balls -1ng Materlals, of which improvement the and material to be ground, or a portion 60 following is a specification. thereof. It is preferred that the several The invention described herein relates to chambers in which reduction is effected 1 improvements in pulverizing materials such should be closely adjacent to and preferably .as coal for fuel, and has-for its object the in the sam -dru removal of the pulverized material from one In the construction shown herein the 'ro- 6 mill or pulverizing mechanism to another, tating drum consists of a stationary casing I and the final discharge to the point of use 4 enclosing a shell 5 having perforations or storage by means of currents of air passwhichcommunicate with passages 17 formed 7 ing through the charge in the respective mills in liners 18 which may extend longitudinally. or pulverizers, the fineness ofparticles reof the shell as shown and described in ap- 70 moved from the respective mills being deterplications Serial Nos. 393147 and 474079, minable by the rate of flow of the air curfiled by me June 30, 1920,.and June 1, 1-921, rents. The invention is hereinafter more respectively. The shell is provided. with fully described and claimed. trunnions 7, one of which is made hollow In\the'accompan ing drawings forming for the introduction of thelmaterial to be 75 a part of this specification, Fig. 1 is a view -reduced into the chamber wherein initial re partly in plan and partly in section of a pulduction is efi'ected. The trunnions are verizing mill of the drum-and-ball type emmounted in'fixed bearings 8 and the shell is bodying the improvements claimed herein; driven in any suitable manner, as for ex- Fig; 2'is a sectionalelevation, the plane of ample, by a'pinion 9 engaging peripherally 80 section being indicated by the line 11-11, arranged. teeth 10. When employing a. v Fig. 1; Fig. 3 is a view partly in side elevasingle pulverizing unit, the casing 12 and tion and partly in section of the construc-- shell 5 should be made of a lengthproportion shown in Fig. 1 Fig. 4 is a sectional tional'to the number and length of chambers elevation ona plane indicated by the line desired and divide the same longitudinally 85 IV IV; Fig. 3; Figs. 5, 6, 7, "and 8 are views by one or more diaphragms. similar toFi s.1 to 4 respectively and illus- In order to introduce air into the first trate a. modif cationpa further modification chamber A, an enlargement 12 is formed in is shownin Figs. 9,10, and 11, Fig. 9 being thecasing4 the chamber so formed connected a sectional plan and Figs. 10 and 11 secby a pipe 13 toa s'uitable'sourceof supply 90. tional elevations on planes indicated re such as a blower A as shown in Fig. 2 when spectively by the lines XX and XI-XI, air above atmospheric pressure is employed. Fig. .9; another modification is shown in The air entering into thischamber 12 will Figs. 12 to 15, Fig. 12 being a top plan; Figs. pass through the perforations in the pe- 13 and 14 sectional elevations on planes inriphery of the shell and passages 17 into'the dicated res ectively by lines XIIIXIII interior of the latter and .then pass through and XIV-- V, Fig. 12; Fig. 15 is a'secthe charge consisting of'balls and material 45 tional plan view; Fig. 16 is a top plan view to be reduced, out through other passages 17 of a method of directing the air currents and perforations in the shell into a channel through the chamber of the pulveri'zing ap- 14 formed by an enlargement of the casing paratus and Figs. 17 and 18 are sectional 4 and extending longitudinally of the casing elevations, the lane of section being indibeyond the partition 11. From this channel 50 cated respective y by the lines XVII-XVII the air will passthrough the perforations in.

and XVIII-XVIII, Fig. 16. i I the shell and passages 17 and throu h the Broadly considered my invention consists charge and escape from the chamber into in effecting reduction of material. in one a chamber 18 formed by an enlargement of the casing and be conducted by the pipe 19 to the place of .storage or use. In its passage through the charge in the chamber A- the current will pick up fine material, the maximum size of the material so picked up being dependent upon the rate of flow of the air through the chamber and charge. The.

material'thus picked up is carried into the charge of the chamber B and as the rate of flow-0f the current has'been retarded in its passage through the charge in chamber A, it will' withdraw from the charge in the chamber B material suitably reduced in size from. that carried into the charge in thechamber B; In case a current of air coming from the chamber A will not have a suflicient rate to pick up as large particles as desired to be removedfrom the charge in the chamber B, an auxiliary current of air may be introduced into the channel 14 by means of a branch pipe 20 provided with a regulating valve 21.

As will be readily understood by those skilled in the art, the size ofthe material which'will be carried from the charge in chamber A in the construction shown in Figs. 1 to 1, into theconnecting passage by the current of air through the necessarily be quite fine and when it is decharge, will sired to transfer coarser particles without unduly increasing the rate of flow of air,'

the latter may be so introduced into chamber A that it will'pass through the periphery of the shell through the charge into the chamber at a point where the charge begins -'to loosen up or near the upperportion of its movement within the shell.

In such case, theinlet chamber 12 is located at a point in the casing in line or nearly in line with the upper limit 'of the movement of .the

charge the rotation of the drum. When,

the airls so introduced as shown in F igs. 5 and 6, it is'preferred that the movement of the. air carrying the material from chamber 19*. As is well known, pulverized the current of air.

Ashould pass through perforations 22 in the d1aphragm'11 into the drum B. The

'airthus entering the chamber B will sweep along the surfaces of the pulverized material from the charge in chamber B an additional current of air is employed and is directed through the perforatlons in the charge into chamber B.

This additional air is introduced through a pipe20 into chamber 22 formed by an and plpe In order to remove the enlargement of the casing, the flow of air being controlled by a damper 21.

In the construction shown in Figs. 9 to 11 inclusive, the manner of introducing the air into chamber A and conducting it into chamber B, and also the employment of additional air when necessary, is substantially similar to that employed in the construction shown in Figs. 1 to 4 inclusive, but in lieu of providing a peri .heral outlet' for the air from the chamber the trunnion 7 adjacent to the chamber B andv communicating therewith, is formed hollow permitting the escape of air to the pipe 19 which'will conduct it'to a point of use or storage.

As at times the air escaping from the chamber B and laden with'pulverized fuel may not have a sufficiently .high 'rate oil flow to carry such material to the point of combustion or storage, and in order to obviate an increase in the rate of flow of air through the chamber B as will be necessary for such transfer, a by-pass 23 is formed conmeeting the inlet pipe 20 for the additional air with the outlet pipe 19 as shown in Figs.

shown in Figs. 12 to 13. for introducing the air into chamber A and thence to chamber B through perforations in the diaphragm 11 is substantlally similar to that shown and described in Figs. 5 to 8 inclusive, it will be understood that a b pass can be arranged in connection with t e different forms or modifications shown herein. p

In the construction shown in F1gs. 1 to. 15 inclusive, the 'air currentin one or the other of the chambers A-B will pass from the chamber outwardly through the charge andthrough the perforation-s in the shell. Where the air passes from the chamber out through the charge the latter will have a screening effect and the compactness of the charge may require a higher pressure than is desired. In order to overcome this difficulty provision is made as shown in Figs. 16' to 18 inclusive, for causing the air in each of the jchambers to pass inwardly through the perforations in the shell and through the charge into the chamber. In the construction shown in these figures, the air is admitted through the pipe 13 and chamber 12 into the chamber A and will, as

shown, pass through the charge into the chamber and escape therefrom throu h achamber 24 formed by enlargement o the casing 5; pipe 25 which'has its opposite endconnected to a chamber 26 also formed by an enlargement of the casing preferably so located that the air passes through this pipe, will pass through the charge in chamber B adjacent to the upper portion of the charge or. where the charge begins to loosen up. The air will escape from the chamber. B through chamber 18 and pi e 19 As hereinbefore stated, where t e air passes through .12 to 15 inclusive. While the arrangement the charge in flowing from chamber B the latter will have a screening effect and prevent the removal of the coarse or too large particles of material, but in cases where air enters the chamber 13 through the portion of the charge where it begins to loosen up, too coarse particles may at times be carried from the charge and in order to prevent such coarse particles ,being carried out of the chamber a screen of suitable mesh may be employed. Such an arrangement is shown in Fig. 9 wherein a screen 27 is arranged in the hollow trunnion 7 I It is desirable inthe operation of the pulverizer of the type described and shown herein that all portions of the several chambers should be swept by currents of air to prevent a deposit of. the pulverized material therein and the air, it will be understood, should enter at different points in order that it may reach all portions of the chambers,

- and hence it maybe desirable to admit air through the one or both of the trunnions as shown in the drawings. It will be understood by those skilled in the art that the air may be caused to flow through the several parts of the apparatus as described either by attaching the outlet from the final chamber toa vacuum apparatus such as an exhaust fan B as shown in Fig. 7, or air at a pressure higher than atmospheric may be supplied through the inlet pipe of the first chamber of the series by a suitable form of blower as shown at A in Fig. 2.

It will be understood that although the term balls is employed herein, that durable bodies known in the art, such as pipes, rods, cobble stones, etc., may be employed and that the term balls is used generic'ally herein as covering any such known device.

I claim herein as my invention: 1. An apparatus for reducing frangibl material having in combination a plurality of rotatable chambers each having a mass of independently movable pieces of hard material therein, means for feeding material to be reduced into the first chamber, means for directing currents of air through the charge in the first chamber, means for directing the air escaping from the first chamber through the mass in a succeeding chamber and means for directing auxiliary currents of air through the charge in the succeeding chamber.

2. An apparatus for pulverizing material having in combination a rotatable shell hav- .ingperforation's in its periphery and provided with chambers or compartments, a casing surroundm said shell, masses of independently mova le pieces of hard material in said chambers, means for feeding material into one of said chambers, means for feeding airthrough the casing into the chamber into which the material is introing perforations in its periphery and provided with a plurality of chambers or compartments, a casing surrounding said shell, masses of balls in said chambers, said casing having ports or openings for .the entrance of and escape of air through the peripheries of the several chambers, one of the ports of one chamber being connected to a port in a succeeding chamber. 7

4:. An apparatus for pulverizing material having in combination a rotatable shell having perforations in its periphery and provided with a plurality of chambers or compartments a casing surroundin said shell and provided with ports or openings for the entrance and escape of air through the peripheries of the several chambers, a connecsaid "chamber and ports in the portion of the,casing surrounding the'second chamber permitting'the flow of air through the shell intoand out of the second chamber.

6. In an apparatus for pulverizing material the combination of a rotatable shell havinghollow trunnions and having perforations in its periphery, a casing surrounding the shell, a perforated diaphragm dividing the shell longitudinally, said casing having a port or opening in the portion surrounding the chamber into which the material to be reduced is fed, permitting of the inflow of air through the periphery of the chamber'and a port or opening in the .portion thereof surrounding the second chamber permitting of the flow of air inwardly throu h the periphery of said chamber.

7. F11 an apparatus for pulverizing material the combination of a rotatable shell having hollow trunnions and having perforations in its periphery, a casing surrounding the shell, a perforated diaphragm dividing the shell longitudinally, said casber permitting the fl'ow of air inwardly ing having a port or opening in the portion through the periphery of said chamber, and surrounding the chamber into which the a screen arranged in the trunnion forming 10 material to be reduced is fed, permitting the the discharge from the second trunnion.

v inflow of air through the periphery of the In testimony whereof, I havehereunto set chamber and a port or opening in the pormy hand.

tion thereof surrounding the second cham- RALPH E. H. POMEROY. 

